Rendered eevee is blurry
Your active camera has Depth of Field enabled and the focus is controlled by the object camera DOF. But for some reason, your camera DOF is in the nirvana. If you select it and try to grab it with G the location is nan(ind)?! Similar to this question nanind-m-location-for-camera. (Honestly, I don't know how to fix this.)
I just would delete the bad object, create a new Empty and specify it as DOF object. Move the Empty (Sphere in the screenshot) to your model. This is where the camera's focus is. The background will be blurry.